What could we do to destroy dangerous
radioactive energy from spent nuclear
fuel rods?
A. Contain them underground
B. Insulate them in lead-lined boxes
C. Nothing, until the energy changes form

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.